Pennsylvania State Route 258 runs east-west in Southern Mercer County. It runs from Pennsylvania State Route 18, near Shenango Lake, to the Butler/Mercer County Line, near North Liberty. PA St Rt 258 passes through the following towns in Mercer County. Sharpsville Mercer Blacktown London North Liberty PA St Rt 258 is multi-plexed in Mercer County. U.S. Rt. 62, at Mercer. U.S. Rt. 19, at Mercer. Pennsylvania State Route 208, near London. PA St Rt 258 crosses the following towns in Mercer County. Pennsylvania State Route 18, at Sharpsville. U.S. Rt. 62, near Mercer. U.S. Rt. 19, at Mercer. U.S. Rt. 62, at Mercer. Pennsylvania State Route 58, at Mercer. Pennsylvania State Route 158, at Mercer. Interstate 80, near Mercer. (NO Interchange) Pennsylvania State Route 208, near London. Interstate 79, near London. Pennsylvania State Route 208, at London.
